摘要
为研究群体建筑内不利风环境的形成机理,利用FLUENT软件对群体建筑内的风环境状况进行了数值仿真,采用基于Reynolds时均N-S方程和RNGk-ε湍流模型的数值方法,计算区域的划分采用具有良好适应性的四面体网格,并用有限容积法对控制微分方程进行离散;仿真得到的计算值与已有的风洞试验值进行了比较并对可能产生的误差进行了分析;数值仿真结果表明,群体建筑的通道入口处风速较大,而背风区域流速较弱,人行高度处的风速随着建筑高度的增加而减弱。
In order to study the forming mechanism of bad wind condition around the buildings, numerical simulation is carried out to investigate the wind flow around buildings by using FLUENT code. The simulation is based on the Reynolds averaged N- S equations and the RNG k-ε turbulence model. In the simulation,the computational domain was divided into tetrahedral elements with good adaptability and the finite - volume method was used for numerical discretization of the governing differential equations, The numerical results have been compared with wind tunnel test results and the errors between the numerical results and tunnel test results have been analyzed. The obtained results indicate that the wind - velocity at the enterance of the buildings is accelerated and in the back area of buildings is weakened; the total wind- velocity at pedestrian height level （2.0 m） surrounding higher building complex may be lower.
出处
《计算机仿真》
CSCD
2008年第6期296-298,307,共4页
Computer Simulation
关键词
风环境
群体建筑
风速比值
数值仿真
Wind environment
Urban street
Wind - velocity ratios
Numerical simulation
